There is lots to learn about this route, and you can find most of it here on BP, but its by far the best way to find deeply discounted properties and also being able to have some precious time to check it out without the competition breathing down your neck.

A reputable title company should not be working so closely (by Phoenix Home Buyers Club's own admission, they give Title Alliance of Phoenix an incredible amount of business) with an industry that misleads people about their most precious investment.

@Connor ParsonsTo learn about what is considered self-employment activity for participating in a solo 401k plan, please see the following. https://www.irs.gov/businesses/small-businesses-se...Following are the similarities and differences between the solo 401k and the self-directed IRA.The Self-Directed IRA and Solo 401k SimilaritiesBoth were created by congress for individuals to save for retirement;Both may be invested in alternative investments such as real estate, precious metals tax liens, promissory notes, private company shares, and stocks and mutual funds, to name a few;Both allow for Roth contributions;Both are subject to prohibited transaction rules;Both are subject to federal taxes at time of distribution;Both allow for checkbook control for placing alternative investments;Both may be invested in annuities;Both are protected from creditors;Both allow for nondeductible contributions; andBoth are prohibited from investing in assets listed under I.R.C. 408(m).The Self-Directed IRA and Solo 401k DifferencesIn order to open a solo 401k, self-employment, whether on a part-time or full-time basis, is required;To open a self-directed IRA, self-employment income is not required;In order to gain IRA checkbook control over the self-directed IRA funds, a limited liability company (IRA LLC) must be utilized;The solo 401k allows for checkbook control from the onset;The solo 401k allows for personal loan known as a solo 401k loan;It is prohibited to borrow from your IRA;The Solo 401k may be invested in life insurance;The self-directed IRA may not be invested in life insurance;The solo 401k allow for high contribution amounts (for 2017, the solo 401k contribution limit is $54,000, whereas the self-directed IRA contribution limit is $5,500);The solo 401k business owner can serve as trustee of the solo 401k;The self-directed IRA participant/owner may not serve as trustee or custodian of her IRA; instead, a trust company or bank institution is required;When distributions commence from the solo 401k a mandatory 20% of federal taxes must be withheld from each distribution and submitted electronically to the IRS by the 15th of the month following the date of each distribution;Rollovers and/or transfers from IRAs or qualified plans (e.g., former employer 401k) to a solo 401k are not reported on Form 5498, but rather on Form 5500-EZ, but only if the air market value of the solo 401k exceeds $250K as of the end of the plan year (generally 12/31);When funds are rolled over or transferred from an IRA or 401k to a self-directed IRA, the amount deposited into the self-directed IRA is reported on Form 5498 by the receiving self-directed IRA custodian by May of the year following the rollover/transfer.Rollovers (provided the 60 day rollover window is satisfied) from an IRA to a Solo 401k or self-directed IRA are reported on lines 15a and 15b of Form 1040;Pre-tax IRA contributions on reported on line 32 of Form 1040;Pre-tax solo 401k contributions are reported on line 28 of Form 1040;Roth solo 401k funds are subject to RMDs;A Roth 401k may be transferred to a Roth IRA (Note that from a planning perspective, it may be advantageous to transfer Roth Solo 401k funds to a Roth IRA before turning age 70 ½ in order to escape the Roth RMD requirement applicable to Roth 401k contributions including Roth Solo 401k contributions and earnings.)

If it is real estate, lending, precious metals, stocks, etc let her use her experience and knowledge to invest. 56 is not that old..

As I have focused on my realtor business, my time has become more precious and more valuable.

I was also in payday advances and the jewelry business.

Thank you for your precious help!

@Phuong DinhThe code section you refer to outlines Individual Retirement Arrangements, commonly referred to as IRA plans.The code allows for a wide variety of investments including conventional financial products as well as real estate, privately held stocks, precious metals, etc.Firms like Vanguard bundle plan administration services along with offering investments, and are generally limited to publicly traded stocks, funds, etc.Specialty firms offer what are called self-directed IRA plans that can be invested more broadly. 

Why would I put excess share of my precious capital in a mortgage to save 4% APR, when I could buy another rental and earn way more?

Here's the information I have on it:PROPERTY SUBJECT TO INHERITANCE TAX All real property and all tangible personal property of a resident decedent, including but not limited to cash, automobiles, furniture, antiques, jewelry, etc., located in Pennsylvania at the time of the decedent’s death is taxable.